Seismic Analysis of Irregular Planned RC Frame: Capacity Based Design Criteria

Abstract

Abstract: This study examines the capacity-based design of structure that is increasing commonly in earthquake resistance design. For making any structure earthquake resistant capacity-based design approach is good to hire because it takes less specialization. Low to medium rise buildings are performing well for the seismic actions when designed as per capacity- based criteria. The other method is to install lateral load resisting element such as shear wall, dampers, base isolators etc. These methods of seismic resistance are costly and requires special attention while installation. On the other hand, capacity based designed approach requires no extra element in frame although making existing frame elements to be stronger. In the present work, three type of irregularity is being taken and those are being imposed over RC frame which has designed as per capacity-based design criteria for four different heights of G+3, G+5, G+7, G+10. Those models are analyzed for commercial use and located at seismic zone IV. Linear static, linear dynamic and nonlinear static methods are used to analyze those models with help of CSI ETABS v19 software. Results which are discussed is modal analysis, storey drift, torsional ratio, ductility ratio, performance point and hinge results. Keywords: Beam column capacity ratio, collapse mechanism, Strong column–weak beam design, plastic hinge, irregularity, geometry, shape and size of the building, ETABS.